Orbit

The bonysocket in which the eyeball is placed. Theorbits are conical in shape with their apicesextending backward and toward each otherwhile the front or base of the cone is open,leaving the eyeballs to be protected by the eyelids in front.

Source: Ophthalmic Dictionary including pronunciation, derivation and definition of the words used in Optometry and Ophthalmology by James J. Lewis, Oph. D. Professor of Optometry in the Northern Illinois College of Ophthalmology and Otology, Chicago.